Re-do the FST4W-1800 example.

This commit is contained in:
Steven Franke 2021-02-16 10:55:25 -06:00
parent 2b10e6fce6
commit f84b3f2786
4 changed files with 5 additions and 14 deletions

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@ -22,21 +22,12 @@ scheduling behavior, you should select *Random* with this control.
- Select *FST4W* on the *Mode* menu. Set *T/R* to 1800 s and *Decode | Deep*. - Select *FST4W* on the *Mode* menu. Set *T/R* to 1800 s and *Decode | Deep*.
- Select appropriate wide graph settings. For example, try *Bins/Pixel* 1, - Select appropriate wide graph settings. For example, try *Bins/Pixel* 1,
*Start* 1200 Hz and *N Avg* 150. *Start* 1200 Hz and *N Avg* 150.
- Enable the multi-threshold noise blanker by setting the noise blanker *NB* to -1.
This setting tells the decoder to try 0, 5, 10, 15, and 20 % blanking.
The *NB* setting is located just above the green receive power indicator and below the
frequency selection menu.
- Open a sample Wave file using *File | Open* and select the file - Open a sample Wave file using *File | Open* and select the file
...\save\samples\FST4+FST4W\210203_0600.wav. Processing may take a minute or ...\save\samples\FST4+FST4W\201230_0300.wav.
more because of the noise blanker setting. When it is finished you should When it is finished you should see a single decode as shown in the
see a single decode as shown in the screenshot: screenshot:
image::FST4W-1.png[align="left"] image::FST4W-1.png[align="left"]
image::FST4W-2.png[align="left"]
The weak signal associated with the single decode is all but invisible on the Note that the weak signal associated with the single decode is all but invisible on the
widegraph spectrogram. Note that the sample wave file will not decode if widegraph spectrogram.
the noise blanker is turned off
(*NB* set to 0 %) or if it is set to any positive number less than 14 %. Using
*NB* -1 tells WSJT-X to try noise blanker settings 0, 5, 10, 15, and 20 %. Similarly,
*NB* -2 tells WSJT-X to try noise blanker settings 0, 2, 4, 6, ..., 20 %.